142131381 has 16 divisors (see below), whose sum is σ = 227980800. Its totient is φ = 76943088.

The previous prime is 142131347. The next prime is 142131397. The reversal of 142131381 is 183131241.

It is a de Polignac number, because none of the positive numbers 2^k-142131381 is a prime.

It is a super-2 number, since 2×142131381² = 40402658929934322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142132381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177711 + ... + 178508.

It is an arithmetic number, because the mean of its divisors is an integer number (14248800).

Almost surely, 2^142131381 is an apocalyptic number.

It is an amenable number.

142131381 is a deficient number, since it is larger than the sum of its proper divisors (85849419).

142131381 is a wasteful number, since it uses less digits than its factorization.

142131381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356248.

The product of its digits is 576, while the sum is 24.

The square root of 142131381 is about 11921.8866376090. The cubic root of 142131381 is about 521.8711936854.

The spelling of 142131381 in words is "one hundred forty-two million, one hundred thirty-one thousand, three hundred eighty-one".